DailyUI Challenge 004

Hey guys,

A new day a new task!

Here is my upload of day 4 - DailyUIChallenge.
What the hell did i need to create? Well a calculator. I have to admit it's harder than it looks you need to have a grid. If you create something new people will not know what to do with it!

Well guys not chitchatting around - Here is the design hope you like it feedback is welcome.

Cheers!